摘要:
The present invention provides a method, dual rectangular patch antenna system, and radio for providing isolation and diversity while eliminating the need for a diplexer or a second transmit/receive switch. The dual rectangular patch antenna system comprises a first rectangular patch antenna (202), a second rectangular patch antenna (204), and a switch (206). Receive path diversity is provided by switching between the first rectangular patch antenna (202) and the second rectangular patch antenna (204).
摘要:
A manufacturably improved asymmetric stripline enhanced aperture coupler (10) is provided including a first non-transverse electromagnetic (non-TEM) field which couples an asymmetric stripline transmission line (22) to a coupling conductor (19) through a first aperture (17) in a first ground plane (16). The coupler (10) suppresses a second non-TEM field formed as an image on a second ground plane (15) by reducing the current flow on the second ground plane (15) using the asymmetric stripline transmission line (22) with increased coupling between a stripline conductor (12) and first ground plane (16) relative to coupling between stripline conductor (12) and second ground plane (15), particularly in the vicinity of the second non-TEM field using second aperture (14). The second non-TEM field is suppressed so as to enhance the coupling effect of the first non-TEM field between asymmetric stripline transmission line (22) and a coupling conductor (19).
摘要:
An RF tagging system which provides a large number of potential identification codes without increasing the physical size of RF tags used therein includes a plurality of RF tags (20, 90, 140, 230, 250) and an external reader (200). Each RF tag includes at least one resonant circuit (22, 92, 142, 231, 251) which is resonant at any one of a plurality of different frequencies, a receiver (34, 102, 152,244, 264) for receiving an interrogation signal, and a control (36,104,154,246, 266) responsive to receipt of an interrogation signal for causing its at least one resonant circuit to be resonant at selected ones of the different frequencies in a predetermined time sequence corresponding to a predetermined identification code. The external reader includes a detector (216, 218, 220, 222) for detecting the selected resonant frequencies of the RF tags and a decoder (226) for decoding the time sequence of the selected resonant frequencies for recovering the predetermined identification code.
摘要:
An electronic device (100) includes an antenna system (150) having two antennas (110, 120). A first antenna (110) has a first antenna element (111) positioned outside a first corner (191) of a planar, rectangular ground plane (165) and a second antenna element (115) positioned outside a second corner of the ground plane that is diagonally across from the first corner. A second antenna (120) has a third antenna element (121) positioned near a third corner (193) of the ground plane that is adjacent to the first corner and a fourth antenna element (125) positioned near a fourth corner (195) of the ground plane that is diagonally across from the third corner. At low-band frequencies, the antenna elements (111, 115) of the first antenna (110) are driven out-of-phase relative to each other. Similarly, at low-band frequencies, the antenna elements (121, 125) of the second antenna (120) are driven out-of-phase relative to each other.
摘要:
An antenna is provided, which is located within an enclosure. The antenna includes one or more arms, where each arm has an electrical length corresponding to an intended frequency band of transmission, and along said length of the arm a source of external loading will have a variable effect. The enclosure includes one or more anticipated points of contact, where a source of external loading will be brought into proximity with said enclosure, and where the one or more arms are constructed and arranged to locate the relatively high impedance areas of the antenna at least a predetermined distance from the one or more anticipated points of interest, and the relatively low impedance areas of the antenna are located more proximate the anticipated points of interest.
摘要:
A multi-function antenna system for a radio communication device includes a housing that encloses a radio frequency transceiver of the radio communication device. A mounting base is coupled to the housing and has a first set of electrical contacts coupled to the transceiver. An antenna element is coupled by a hinge to the mounting base and has a second set of electrical contacts. Different portions of the first and second set of contacts are connectable as a function of the relative positions of the mounting base and the antenna element so as to provide different antenna functions.
摘要:
An antenna for an electronic apparatus is located in a flip element of the apparatus housing. A transformer, having a winding in the flip element and a winding in the housing couples electromagnetic energy across the hinge while impedance matching and performing a balun function.
摘要:
The antenna coupling apparatus of the present invention couples an antenna, located in a hinged element (102) of a wireless communication device, to the receiver (401) of the device. In the preferred embodiment, the communication device is a radiotelephone. The coupling is achieved without contact or flexible cable by parallel plate capacitors (201 and 202) in the hinge of the communication device. The capacitors (201 and 202) additionally act as a matching network for the antenna.
摘要:
An electronic device (100) includes an antenna system (150) having two antennas (110, 120). A first antenna (110) has a first antenna element (111) positioned outside a first corner (191) of a planar, rectangular ground plane (165) and a second antenna element (115) positioned outside a second corner of the ground plane that is diagonally across from the first corner. A second antenna (120) has a third antenna element (121) positioned near a third corner (193) of the ground plane that is adjacent to the first corner and a fourth antenna element (125) positioned near a fourth corner (195) of the ground plane that is diagonally across from the third corner. At low-band frequencies, the antenna elements (111, 115) of the first antenna (110) are driven out-of-phase relative to each other. Similarly, at low-band frequencies, the antenna elements (121, 125) of the second antenna (120) are driven out-of-phase relative to each other.
摘要:
An electronic device (100) includes an antenna system (150) having two antennas (110, 120). A first antenna (110) has a first antenna element (111) positioned near a first corner (191) of a planar, rectangular ground plane (165) and a second antenna element (115) positioned near a second corner of the ground plane that is diagonally across from the first corner. A second antenna (120) has a third antenna element (121) positioned near a third corner (193) of the ground plane that is adjacent to the first corner and a fourth antenna element (125) positioned near a fourth corner (195) of the ground plane that is diagonally across from the third corner. At low-band frequencies, the antenna elements (111, 115) of the first antenna (110) are driven out-of-phase relative to each other. Similarly, at low-band frequencies, the antenna elements (121, 125) of the second antenna (120) are driven out-of-phase relative to each other.